Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CA6304-31CA found under Coupling Shaft Rigid by Buffalo Pumps Inc. The National Stock Number assigned to this part is 3010002520029, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CA6304-31CA.